<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title>任务四</title>
    <link rel="stylesheet" href="css/style.css">
</head>
<body>
    <div class="square">
        <div class="circle1">

        </div>
        <div class="rectange">

        </div>
        <div class="circle2">

        </div>
    </div>
</body>
</html>